/// <summary>
/// 判断两条曲线是否近似垂直，默认tolerance为0.01
/// </summary>
/// <param name="curve1"></param>
/// <param name="curve2"></param>
/// <returns></returns>
public static bool IsAlmostVerticalTo(this Curve curve1, Curve curve2)
{
if (curve1 is Line && curve2 is Line)
{
XYZ xyz1 = (curve1 as Line).Direction;
XYZ xyz2 = (curve2 as Line).Direction;
return(xyz1.IsAlmostVerticalTo(xyz2));
}
return(false);
}